Linwu in context: Street-network sprawl trends

Linwu in context

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
LinwuHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Linwu plotted against Hunan and China. The SNDi of new construction in Linwu peaked in 1976-1990, compared to Hunan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Linwu's incremental SNDi fell from 1.88 to 1.68 between 1991-2005 and 2006-2020. In terms of the aggregate network, Linwu ranked 17th out of 89 cities in Hunan and 410th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.68
Rank in China
110th of 1843
Rank in Hunan
7th of 89

Entire Network (Aggregate)

SNDi value
2.26
Rank in China
410th of 1843
Rank in Hunan
17th of 89

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
LinwuAgua PrietaJingzhou

Linwu, Agua Prieta, and Jingzhou all built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street construction. The same pattern holds for the full street network. Notably, Linwu had a more connected network than Agua Prieta in 1975 but the two have since reversed their relative ranking.